<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>123</title>
</head>
<body>
<script>
    let title = 'title';
    let ok = 'ok';

    let str = `ni hao ma ${title} wo shi ${ok}`;
    console.log(str);
</script>
</body>
</html>